Believe the better way to answer your question is all documentation I could find points to Steelhead Cloud Accelerator and Steelhead Mobile Client are not supported directly at this time. If you are asking about point to point Office 365 Optimization directly from the Laptop to the Cloud Steelhead. If you need to documentation the Release Notes show the requirements of Hardware Steelhead only to load the software.
Optimization directly between the SteelHead Mobile Client and MS Office365 is not supported currently, maybe soon.
@Gerald, that feature enhancement in 4.7 software version is specifically for the connection support between the server-side SH and the Mobile client where the mobile client can have a optimized connection between itself and the server-side, which in turn has the connection to Office365